Glass-drawing apparatus



W. GRAY GLASS DRAWNG AFYARTUS Filed Jan. 2.6, 132').

Malz'. 20, E923.

May. 2u; 11923.-

W. GRAY GLASS DRAWING APPARATUS l Filed Jan. 26, 1921 5 sheets-sheet 2 LAMQSS Malz. 2G, H923.

W. GRAY GLASS DRAWING APPARATUS 5 sheets-'sheet 5 Filed Ja. 26, 1921 guides for the rear chains,

Patented Mar.. 26, 11923.

NETE@ STATES WILLIAM GRAY, or LANCASTER, OHIO.

GLASS-DRAWING APPARATUS.

Application filed January 26, 1921. Serial No. 440,086.

To all whom t may co'ncem:

Be it known that I. lVILLIAw GRAY, a citizen of the United States. residing at Lancaster, in the county ot" Fairfield and State of Ohio, have invented certain new and useful Improvements in Glass-Drawing Apparatus, of which the i'ollowing is a specification.

The present invention relates to apparatus for drawing glass sheets. and is of the type disclosed in my application, Serial No. 395.246, filed July 10, 1920.

The' object in view is the provision of novel and effective means fol' preventing t-he contraction ot' the sheet adjacent to its juncture with the body of glass from which it is formed,

`In the accompanying drawings Figure 1 is a vertical sectional view through an embodiment of the invention.

Figure 2 is a detail sectional view on an enlarged scale through the meansl for holding the sheet against contraction;`

Figure 3 is a horizontal sectional view.

Figure 4 is a detail view of the lower Figure 5 is a cross sectional view through Figure 4,

Figure 6 is a detail view partly in elevation and partly in section of one of the front guides,

Figure 7 is a detail view of a portion of the sheet carrier member, and

Figure 8 is a perspective view of the same.

In the embodiment disclosed, a portion of a reservoir or tank for molten glass, is indicated at 9 and may be of any desired or well known construction. Located adjacent thereto is drawing means, comprising an endless carrier member. The same includes hangers 10 supporting an endless series of hingedly connected plates 11, and provided with rollers 12 that operate in a guideway 13. This carrier has a vertical stretch 14: located above the reservoir, and its lower portion which moves toward said vertical stretch, passes through a cooling bath 15. So far as thus described, the structure may be that specifically set forth in the above mentioned application. The sheet designated A is drawn from the reservoir 9, and is carried upwardly against the face of the plates 11 on the vertical stretch. It then passes horizontally rearwardly, as indicated in Figure 1.

For the purpose of preventing the portion of the sheet just above the reservoir 9 from contracting as it moves upwardly, the following mechanism is preferably employed. Two endless chains 16 somewhat longer than the carrier 11. are supported thereby, and have upwardly extending stretches 1T that are located alongside the opposite side margins ot the sheet A. The chains 16 have projections 16"L that engage the pintles 10a of the carrier. Lower stretches of these chains pass through the cooling bath 15,. Directly over the reservoir 9 are guiding means for these chains. Said guiding meains preferably are in the form of blocks 18 suitably supported, as shown at 19. and having grooved rollers 20 journaled at their lower portions, the edges ot the blocks being also grooved, as shown at 21. The chains are provided with ,teeth 22 that impinge in the marginal portions otAthe rear face of the sheet A.

()n the opposite side of the sheet and just above the reservoir are spaced supporting blocks 23 carrying at their lower ends guide rollers 24, and about said blocks pass endless chains 25 having vertical stretches 26 that move alongside the marginal portions ot' the sheet A in opposition to the vertical stretches 1T of the chains 16. These chains 25 are also provided with teeth 26a that impinge in the margins of the sheet. The edges of the blocks 23 are grooved to form guides for the chains 25, and the upper ends of said blocks have depressions 27 forming wells or reservoirs for cooling liquid, the' chains looping downwardly through the cooling baths thus provided. These reservoirs or wells may be supplied with liquid from any suitable source, for example, through pipes 28. and outlets 29 may be employed for carrying off the water or other liquid in order to obtain a circulation in the reservoirs.

lt will be evident that with this construction as the sheet is continuously drawn upwardly from the batch of metal, the vertical stretches `of the chains will move upwardly therewith and the teeth will clamp both margins of the glass, thus preventing its tapering oit' under the strain of the drawing operation.

From the foregoing, it is thought that the construction, operation and vmany advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size,`

shape, proportion and minor details-diconstruction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is y.

l. rlhe combination with sheet drawing apparatus, of means for maintaining a prelmeans for directing the member through thel holder.

l, 2. An apparatus for drawing lsheet glass comprising an endless member for carrying the sheet, an endless member of greater length associated therewith, teeth on said latter member to engage the margin of the sheet on one side, a shorter endless member with teeth to engage the margin of the. sheet 0n the other side, and ra separate cool-ing bath 'for eachA of the last two endless members. v

3. An apparatus for drawing sheet glass comprising an endless member for carrying the sheet, an endless member of greater length having engaging projections to cause it to travel with the carrying member and teeth to engage the margin of the sheet on one side, a shorter endless member having teeth to engage the margin of the sheet on the other side, mcommoncooling bath for the carrying member'an'dlthe longer endless member, and a separatgjeooling bath for the shorter endless member..

4. An apparatus for drawing sheet glass comprising an endless member for carrying the sheet, two endless members of greater length travelling in unison therewith and providedwith teeth to engage the margins of the sheet on one side, two shorter endless members having teeth to engage the margins of the sheet on the other side, a cooling bath for the two longer members and separate cooling baths for the shorter endless members.

5. An apparatus for drawing sheet glass comprising a receptacle for containing molten glass, blocks mounted adjacent thereto, pulleys in .the lower ends of the blocks, grooves in the edges of .the blocks, endless chains passing around said blocks and over the pulleys and lying inthe grooves, and projections on said chains to engage the margins of. a sheet of glass being, drawn fromthe receptacle to maintain a predeterf mined width thereof.

6. An apparatus for drawing sheet glass comprising a receptacle for containing molten glass, blocks mounted adjacent thereto, pulleys in the lower ends of the blocks,`

grooves in the edges ofthe blocks, endless members passing around said blocks and over the pulleys and lying in the grooves, projections on said members to engage the margins of a sheet of glass being drawn from the receptacle to maintain a predetermined width thereof, and holders for a cooling liquid in cert-ain of said blocks.

In testimony whereof I aliiX my signature in the presence of two witnesses.

WILLIAM GRAY.

l Witnesses:

E. A. SILBAUGH, L. Gn SILBAUGH. 

